Indo-China Ties New Delhi, September 27: The UPA government has comeunder sharp criticism from its coalition ally for not letting Chinesecompanies invest in the country's infrastructure projects, television reports said on Wednesday.

The CPI(M), whose support is crucial for a Parliamentary majority,wants the government to explain how Chinese investment ininfrastructure projects posed a threat to India's security, the NDTV news channel reported.

The criticism followed a recent decision of the Central governmentcancelling a tender to revamp a port in Kerala after a consortium ofChinese companies won the bid, the report said. It didn't name the Chinese companies.